OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to versions 6.10.5 and 7.0.0-rc3, OpenC3 COSMOS contains a design flaw in the save_tool_config() function that allows saving tool configuration files at arbitrary locations inside the shared /plugins directory tree by supplying crafted configuration filenames. Although the implementation sufficiently mitigates standard path traversal attacks, by canonicalizing filename to an absolute path, all plugins share this same root directory. That enables users to create arbitrary file structures and overwrite existing configuration files within the shared /plugins directory. This issue has been patched in versions 6.10.5 and 7.0.0-rc3.

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Fixes

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History

Mon, 04 May 2026 19:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 04 May 2026 19:00:00 +0000

Type Values Removed Values Added
First Time appeared Openc3
Openc3 cosmos
Vendors & Products Openc3
Openc3 cosmos

Mon, 04 May 2026 17:45:00 +0000

Type Values Removed Values Added
Description OpenC3 COSMOS provides the functionality needed to send commands to and receive data from one or more embedded systems. Prior to versions 6.10.5 and 7.0.0-rc3, OpenC3 COSMOS contains a design flaw in the save_tool_config() function that allows saving tool configuration files at arbitrary locations inside the shared /plugins directory tree by supplying crafted configuration filenames. Although the implementation sufficiently mitigates standard path traversal attacks, by canonicalizing filename to an absolute path, all plugins share this same root directory. That enables users to create arbitrary file structures and overwrite existing configuration files within the shared /plugins directory. This issue has been patched in versions 6.10.5 and 7.0.0-rc3.
Title OpenC3 COSMOS: Arbitrary write to plugins directory via path-traversed config filenames
Weaknesses CWE-23
References
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-04T18:47:32.584Z

Reserved: 2026-04-23T19:17:30.566Z

Link: CVE-2026-42085

cve-icon Vulnrichment

Updated: 2026-05-04T18:43:06.693Z

cve-icon NVD

Status : Received

Published: 2026-05-04T18:16:30.510

Modified: 2026-05-04T19:16:04.110

Link: CVE-2026-42085

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-04T19:00:07Z

Weaknesses